Merge pull request #1 from DanielMowitz/dev

Webfinger detection added.

README.md

@@ -1,3 +1,17 @@
 # ssb_ap_bridge
 
 A Javscript module to implement ActivityPub compatibility to [ssb](https://github.com/ssbc/ssb-db)
+
+Feel free to open a PR or issue!
+
+## What currently works:
+
+- Webfinger detection of known ssb users
+- logging AP messages in ssb
+
+## What still needs work:
+
+- Converting messages between the services
+- encryption of converted messages
+
+

config.json

@@ -0,0 +1,4 @@
+{
+  "DOMAIN": "",
+  "PORT": 3000
+}

index.js

@@ -0,0 +1,29 @@
+const config = require('./config');
+const server = require('./server');
+const express = require('express');
+const app = express();
+const bodyParser = require('body-parser');
+const http = require('http');
+
+var options = { //todo: maybe be more specific here
+    type: "application/*"
+};
+
+app.use(bodyParser.raw(options));
+app.use(bodyParser.urlencoded({extended: true}));
+
+app.set('domain', config.DOMAIN);
+app.set('port', process.env.PORT || config.PORT || 3000);
+app.set('port-https', process.env.PORT_HTTPS || 8443);
+
+app.get('/', (req, res) => res.send('Hello World!'));
+app.get('/u/:name', server.get_user);
+app.get('/.well-known/webfinger', server.get_webfinger);
+app.get('/inbox', (req, res) => res.send('Here lies the inbox'));
+app.get('/users', server.get_users);
+
+app.post('/inbox', server.post_inbox);
+
+http.createServer(app).listen(app.get('port'), function () {
+    console.log('Express server listening on port ' + app.get('port'));
+});

package.json

@@ -2,9 +2,13 @@
   "name": "scuttlebutt_to_ap",
   "version": "1.0.0",
   "dependencies": {
-    "ssb-client": "latest",
+    "express": "latest",
+    "http": "latest",
+    "node-fetch": "latest",
     "pull-stream": "latest",
+    "ssb-client": "latest",
+    "ssb-friends": "latest",
     "stream-to-pull-stream": "latest",
-    "node-fetch": "latest"
+    "body-parser": "latest"
   }
 }

server.js

@@ -0,0 +1,151 @@
+const config = require('./config');
+const ssb_bridge = require('./ssb_bridge');
+
+DOMAIN = config.DOMAIN;
+
+let chars_to_encode = "_!*'();:@&=+$,/?#[]"; // basically anything covered by %-encoding plus underscore
+
+function decode_webfinger_name(name) {
+    name = name + "=.ed25519";
+    for (let i in chars_to_encode) {
+        name = name.replace("_" + chars_to_encode[i].charCodeAt(0).toString(16) + "_", chars_to_encode[i]);
+    }
+    return name
+}
+
+function encode_webfinger_name(name) {
+    for (let i in chars_to_encode) {
+        name = name.replace(chars_to_encode[i], "_" + chars_to_encode[i].charCodeAt(0).toString(16) + "_");
+    }
+    return name;
+}
+
+function get_webfinger(req, res) {
+    let resource = req.query.resource;
+    if (!resource || !resource.includes('acct:')) {
+        return res.status(400).send('Bad request. Please make sure "acct:USER@DOMAIN" is what you are sending as the "resource" query parameter.');
+    } else {
+        let name = resource.replace('acct:', '');
+        name = name.substr(0, name.indexOf('@'));
+        let encoded_name = encodeURIComponent(name);
+
+        let p = ssb_bridge.check_if_in_friends(decode_webfinger_name(name));
+
+        p.then((result) => {
+            if (result) {
+                res.json(
+                    {
+                        'subject': `acct:${encoded_name}@${DOMAIN}`,
+                        links: [
+                            {
+                                rel: 'self',
+                                type: 'application/activity+json',
+                                href: `https://${DOMAIN}/u/${encoded_name}`
+                            }
+                        ],
+                    }
+                );
+            } else {
+                return res.status(404).send(`No record found for ${encoded_name}.`);
+            }
+        }).catch((err) => {
+            return res.status(500).send(`An error occured: ${err}.`);
+        })
+    }
+}
+
+function get_user(req, res) {
+    let name = req.params.name;
+    if (!name) {
+        return res.status(400).send('Bad request.');
+    } else {
+
+        let p = ssb_bridge.check_if_in_friends(decode_webfinger_name(name));
+
+        p.then((result) => {
+            if (result) {
+
+                let uname_p = ssb_bridge.get_username(decode_webfinger_name(name));
+                let uname = '';
+
+                uname_p.then((uname_res) => {
+                    uname = uname_res;
+                });
+
+                if (uname === '') {
+                    uname = name;
+                }
+
+                res.json(
+                    {
+                        '@context': [
+                            'https://www.w3.org/ns/activitystreams',
+                            'https://w3id.org/security/v1'
+                        ],
+
+                        id: `https://${DOMAIN}/u/${name}`,
+                        type: 'Person',
+                        preferredUsername: uname, 
+                        name: uname,
+                        // inbox: `https://${DOMAIN}/u/${name}/inbox`,
+                        inbox: `https://${DOMAIN}/inbox`,
+
+                        publicKey: {
+                            id: `https://${DOMAIN}/u/${name}#main-key`,
+                            owner: `https://${DOMAIN}/u/${name}`,
+                            publicKeyPem: '-----BEGIN PUBLIC KEY-----\n' +
+                                'MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsT4MEtffaV0uFr9jgSnx\n' +
+                                'kb1+MMd1/jGYBugJ4jkHc9rvQRJLA2C8O2LbrdNb/00TRHh0pkR7AJW7DWMhIF/P\n' +
+                                'WmsHcdouAUhovAVO+4yrRK5fMA96JP6k2YwqJK+yjK4SMm9iwvcdBlrkZif0KWvA\n' +
+                                'Qf4eU24n64NSEdVu48cgZwMvQeYKaAtf2LIhXYOE4pA16C05z3BAar+9m2e1yZMG\n' +
+                                '+JzhoywmpqlrB+XK55wjAIhvwVGgOMtUg5FbHU5sH7wZv7H945t40x7HjNCBxU6d\n' +
+                                'yrF7Bl6nMg+ifT5a6SzPSJ0f3g99AyfMVL5fnhSodjpsnjohfIsx9Vzd4oO1JhDx\n' +
+                                'SwIDAQAB\n' +
+                                '-----END PUBLIC KEY-----'
+                        }
+                    }
+                );
+            } else {
+                return res.status(404).send(`No record found for ${name}.`);
+            }
+        }).catch((err) => {
+            return res.status(500).send(`An error occured: ${err}.`);
+        })
+    }
+}
+
+function get_users(req, res) {
+    let p = ssb_bridge.get_friends();
+
+    p.then((result) => {
+        if (result) {
+            let out = {};
+            for (let i in result) {
+                out[i] = encode_webfinger_name(result[i].substr(1).replace("=.ed25519", ""));
+            }
+            res.json(out);
+        } else {
+            return res.status(404).send(`No record found for ${name}.`);
+        }
+    }).catch((err) => {
+        return res.status(500).send(`An error occured: ${err}.`);
+    })
+}
+
+function post_inbox(req, res) {
+    console.log("Saved activity to ssb log.");
+    try {
+        let in_activity = JSON.parse(req.body.toString());
+        ssb_bridge.save(in_activity);
+    } catch (e) {
+
+    }
+    return res.status(200).send('ayy\n');
+}
+
+module.exports = {
+    get_user,
+    get_webfinger,
+    get_users,
+    post_inbox,
+};

ssb_bridge.js

@@ -99,16 +99,16 @@ async function get_last_by_activity_id(id) {
                     if (err) reject(err);
                     for (let i in array) {
                         if (array[i].value.content.type.length > 3 &&
-                            array[i].value.content.type.substr(0,3) === 'ap-' &&
+                            array[i].value.content.type.substr(0, 3) === 'ap-' &&
                             allowed_message_types.indexOf(array[i].value.content.type.substr(3)) >= 0) {
                             if (array[i].value.content.id === id) {
                                 last = array[i];
                             }
                         }
                     }
-                    if (last){
+                    if (last) {
                         resolve(last);
-                    }else {
+                    } else {
                         reject('no activity found');
                     }
 
@@ -199,7 +199,7 @@ function add_ssb_message(type, id, actor, summary, object, origin = null, target
 
 }
 
-async function get_json_from_blob(blob_id){
+async function get_json_from_blob(blob_id) {
 
     /*
      * Gets the Object with the specified id from the
@@ -225,7 +225,7 @@ async function get_json_from_blob(blob_id){
     return await out;
 }
 
-async function restore_ssb_message(id){
+async function restore_ssb_message(id) {
 
     /*
      * Gets the Message with the specified id from the
@@ -246,12 +246,12 @@ async function restore_ssb_message(id){
                 msg.type = msg.type.substr(3);
 
                 delete msg.actor.otherData;
-                for (let key in actor_data){
+                for (let key in actor_data) {
                     msg.actor[key] = actor_data[key];
                 }
 
                 delete msg.object.otherData;
-                for (let key in object_data){
+                for (let key in object_data) {
                     msg.object[key] = object_data[key];
                 }
 
@@ -266,9 +266,84 @@ async function restore_ssb_message(id){
     return await out;
 }
 
-exports.bridge = {
-    save : (message) => {
-        if (message.@context === "https://www.w3.org/ns/activitystreams") {
+async function check_if_in_friends(name) {
+    let result = false;
+    let out = new Promise((resolve, reject) => {
+        ssbClient((err, sbot) => {
+            if (err) reject(err);
+
+            pull(
+                sbot.friends.createFriendStream(),
+                pull.collect((err, array) => {
+                    array.forEach(function (actor) {
+                        let short_actor = (actor.substr(1));
+                        if (short_actor === name) {
+                            result = true;
+                        }
+                    });
+                    sbot.close();
+                    resolve(result);
+                })
+            );
+        });
+    });
+    return await out;
+}
+
+async function get_friends() {
+    let out = new Promise((resolve, reject) => {
+        ssbClient((err, sbot) => {
+            if (err) reject(err);
+
+            pull(
+                sbot.friends.createFriendStream(),
+                pull.collect((err, array) => {
+                    sbot.close();
+                    resolve(array);
+                })
+            );
+        });
+    });
+    return await out;
+}
+
+async function get_username(name) {
+
+    let last = null;
+
+    let out = new Promise((resolve, reject) => {
+        ssbClient((err, sbot) => {
+            pull(
+                sbot.createLogStream(),
+                pull.collect(function (err, array) {
+                    sbot.close();
+                    if (err) reject(err);
+                    console.log(array);
+                    console.log(name);
+                    for (let i in array) {
+                        if (array[i].value.content.type === 'about' &&
+                            array[i].value.author.substr(1) === name &&
+                            array[i].value.content.hasOwnProperty('name')) {
+                            last = array[i].value.content.name;
+                        }
+                    }
+                    if (last) {
+                        resolve(last);
+                    } else {
+                        resolve('');
+                    }
+
+                }),
+            );
+        });
+    });
+
+    return await out;
+}
+
+module.exports = {
+    save: (message) => {
+        if (message["@context"] === "https://www.w3.org/ns/activitystreams") {
 
             add_ssb_message(
                 message.type,
@@ -284,9 +359,8 @@ exports.bridge = {
             throw ("Invalid message context.");
         }
     },
-    restore: (id) => {
-        let p = restore_ssb_message(id);
-
-        return p;
-    }
+    restore: restore_ssb_message,
+    check_if_in_friends,
+    get_friends,
+    get_username
 };